Frederick County ZIP Codes
Maryland, United States · 31 codes
Frederick County in Maryland has 31 ZIP codes, from 21701 to 21798, serving 31 places.
ZIP codes in Frederick
| ZIP Code | Places |
|---|---|
| 21701 | Frederick |
| 21702 | Frederick |
| 21703 | Frederick |
| 21704 | Frederick |
| 21705 | Frederick |
| 21709 | Frederick |
| 21710 | Adamstown |
| 21714 | Braddock Heights |
| 21716 | Brunswick |
| 21717 | Buckeystown |
| 21718 | Burkittsville |
| 21727 | Emmitsburg |
| 21754 | Ijamsville |
| 21755 | Jefferson |
| 21758 | Knoxville |
| 21759 | Ladiesburg |
| 21762 | Libertytown |
| 21769 | Middletown |
| 21770 | Monrovia |
| 21771 | Mount Airy |
| 21773 | Myersville |
| 21774 | New Market |
| 21775 | New Midway |
| 21777 | Point Of Rocks |
| 21778 | Rocky Ridge |
| 21780 | Sabillasville |
| 21788 | Thurmont |
| 21790 | Tuscarora |
| 21792 | Unionville |
| 21793 | Walkersville |
| 21798 | Woodsboro |
Frequently asked questions
What is the ZIP code of Frederick?
Frederick has 31 ZIP codes, from 21701 to 21798. The table lists the places each one serves.
How many places are listed in Frederick County?
31 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.